While walking barefoot on the beach, joe stepped on a thorn that penetrated through the sole of his foot to the dermis. how many layers of epidermis did the thorn penetrate? while walking barefoot on the beach, joe stepped on a thorn that penetrated through the sole of his foot to the dermis. how many layers of epidermis did the thorn penetrate? 1 2 3 4 5

The correct answer is 5.

Explanation:

The main layers of the skin are from outside to inside:

Epidermis Dermis Hypodermis

The epidermis can also be divided into 5 other layers (form outside to inside):

Stratum corneum: composed of corneocytes without nucleus Stratum lucidum: this stratum is only in palms and soles, and gives them the thick skin appearance Stratum granulosum: composed of keratinocytes whose nucleus disappear and left a granulated cytoplasm Stratum spinosum: keratinocytes connected via desmosomes  Stratum basale: keratinocytes connected via hemidesmosomes. Melanocytes and Merckel cells can also be found in this layer.